CVE-2026-73851
Medium
Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.34.0, an attacker who controls or tampers with the OpenAPI description consumed by Kiota can supply a file reference that resolves outside the manifest package (e.g. ../../../../etc/passwd, an absolute path, or a file:// / http(s):// URI). When the generated manifest is deployed and consumed by an AI host, this can lead to inclusion or disclosure of files outside the intended package boundary. This vulnerability is fixed in 1.29.1 and 1.34.0.
SeverityMedium
CVSS6.1
Exploit probability—
ProductMicrosoft.openapi.kiota
PublishedAug 17, 2026
First seenAug 17, 2026
Weakness typeCWE-22Path traversalCWE-829CWE-829
How to fix
Update
- Microsoft.OpenApi.Kiota1.34.0, 1.29.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft.OpenApi.KiotaNuGet | 1.30.0 ≤ v < 1.34.0, v < 1.29.1 | 1.34.0, 1.29.1 |
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